Nigel Farage has described Adolf Hitler as “hypnotic in a very dangerous way” after reiterating his admiration for Vladimir Putin as a “political operator”.

The Reform UK leader offered his view on the public speaking abilities of Nazi Germany dictator Hitler when asked about him during a live BBC phone-in.

He also suggested Ukraine president Volodymyr Zelenskiy should enter negotiations with Russia, although he acknowledged Kyiv’s Western allies will continue to support them.

Mr Farage, challenged about his previous remarks praising Russian president Mr Putin as an operator, told Nicky Campbell on BBC Radio 5 Live: “Yeah, but not as a human being.”

Asked why, Mr Farage replied: “How many years has he been in power? He’s gone from prime minister, to president, he’s a clever political operator. He kills journalists, I don’t like him as a human being in any way at all.

“You can recognise the fact that some people are good at what they do even if they have evil intent.”

Asked if Hitler was good at what he did, Mr Farage replied: “What, as a public speaker? What do you think? Clearly, hypnotic in a very dangerous way.”

On whether talks should be held with Russia to end the war with Ukraine, Mr Farage replied: “This war has been going on for years, it is likely to go on for many, many more years.

“We’re looking at something like a million casualties between the two sides.”

Mr Farage added: “I’m not saying we shouldn’t support Ukraine at all, not for one minute, but at the end of the day most wars end in negotiation and I fear, if we don’t find some way of at least sitting down and talking, that we’re going to finish up with a war that goes on for year after year after year.”

He said he believed the “big difficulty would be Crimea”, adding: “Is it a bad idea to get people to sit around a table and talk?”

Mr Farage was asked what he would say if he was in a position of influence and had a meeting with Mr Zelenskiy.

He said: “I’d say to Zelensky, look, the West have been supporting you, they will go on supporting you but the percentage of your young manhood that you’re losing is so bad, isn’t it time we at least tried to have a negotiation – he couldn’t say no.”

Mr Farage was later asked about his “red lines” if he was in a position to form a coalition with other political parties.

He said: “Brexit was a massive constitutional change, a huge decision that we made. The establishment tried to overturn it but in the end it did go through.

“Making that work I think is really, really important. That’d be a red line.

“The other one, of course, would be that we cannot allow this population explosion to diminish the quality of life of everybody in this country because that is what it’s doing.”

Mr Farage was also asked about climate change, and said: “We should not be committing an act of mindless self-harm.

“We will be using steel, we will be using oil, we will be using gas up until at least 2050 and that’s admitted by every side in this debate, regardless of the scientific debate, we will still be using that hopefully in diminishing quantities, hopefully, maybe, maybe not.

“What I’m saying is it is an act of self-harm to deindustrialise, to put massive bills on the poor when it doesn’t benefit global CO2 emissions at all.”

Mr Farage added he is “pro-nuclear” and believes nuclear power is the “best thing we can do to reduce carbon emissions”.

Asked when he last cried, Mr Farage replied: “Oh gosh. I think quite a long time, I hope quite a long time ago.”

He joked: “Probably going into the jungle on I’m A Celebrity.”

Elsewhere in his Friday morning broadcast media appearances, Mr Farage was challenged to explain what he meant when he said Rishi Sunak does not understand “our culture” – in the wake of the UK prime minister leaving the D-Day commemorations early.

Former City trader Mr Farage, who was a schoolboy at fee-paying Dulwich College, told BBC Breakfast: “He doesn’t know where the centre-ground of opinion in this country is. Rishi is Winchester College, Oxford University, Goldman Sachs – he has no connection to working people in this country at all.”

Pressed further on his language and asked if the colour of Mr Sunak’s skin was a factor, Mr Farage replied: “No, he’s British born for goodness sake – 40 per cent of the contribution in two World Wars came from Commonwealth countries, there are plenty of people here who have come from families who came from the Commonwealth who fully understand this, he doesn’t and that’s part of the problem.”

He went on: “Too many of our ruling class have no connection with the culture of this country, don’t understand what people’s problems are, don’t understand what their aspirations are, and I’m telling you that I do.”